https://www.naturalproductsinsider.com/regulatory/amazon-confirms-plans-removing-nac-supplements
Amazon chickened out. Not sure this will be a trend among other retailers, tho.
GNC pulled it several months back— and a different story from each one asked as to “why”.
NAC is an amino acid— a pre-amino acid compound for cysteine.
This is the FDA in concert with the Pharma people to regulate— a synthetic amino acid precursor.